handleBackpack.sqf

/*
handleBackpack.sqf
Author: cyrq (cyrq1337@gmail.com).
Made for DayZed: http://dayzed.eu

Thanks to Hympnomatic for the _getClass funtion: http://forums.bistudio.com/showthread.php?148285-From-display-name-to-classname&p=2583286&viewfull=1#post2583286

You can use, modify and distribute this without any permissions.
Give credit where credit is due.

Description: Disables the left/right arrows in the INV UI on weapons (if highlighted) when the player
doesn't have the needed amount of free slots in his backpack.
*/

disableSerialization;

_control = 105;
_leftArrow = 146;

_player = player;

if (vehicle player != player) then {
	_player = vehicle player;	
};

_backpack = unitBackpack _player;
_backpackWeaponsMax = getNumber (configFile >> "CfgVehicles" >> (typeOf _backpack) >> "transportMaxWeapons");
_backpackMagazinesMax = getNumber (configFile >> "CfgVehicles" >> (typeOf _backpack) >> "transportMaxMagazines");

_countWeapons = {
	_weapons = [];
	_return = 0;

	_weapons = (getWeaponCargo (unitBackpack player)) select 1;
	{ _return = _return + _x } foreach _weapons;
	_return;
};

_countMagazines = {
	_magazines = [];
	_return = 0;

	_magazines = (getMagazineCargo (unitBackpack player)) select 1;
	{ _return = _return + _x } foreach _magazines;
	_return;
};

_countFreeSlots = {
	_return = [(_backpackWeaponsMax - _weapons), (_backpackMagazinesMax - _magazines)];
	_return;
};

_getClass = { 
    private["_this","_displayName","_default","_out","_cfgWeapons","_cfgMagazines"]; 
     
    _displayName = _this select 0; 
    _default = [_this, 1, "ERROR: Item not found"] call BIS_fnc_param; 
    _out = _default; 
    _cfgWeapons = configFile >> "CfgWeapons"; 
    _cfgMagazines = configFile >> "CfgMagazines"; 

    for "_i" from 0 to count (_cfgWeapons) - 1 do { 
        if ((isClass (_cfgWeapons select _i)) && {_displayName == getText(_cfgWeapons select _i >> "displayName")}) exitWith { 
            _out = configName (_cfgWeapons select _i); 
        }; 
    }; 
    if (_out != _default) exitWith {_out}; 
    for "_i" from 0 to count (_cfgMagazines) - 1 do { 
        if ((isClass (_cfgMagazines select _i)) && {_displayName == getText(_cfgMagazines select _i >> "displayName")}) exitWith { 
            _out = configName(_cfgMagazines select _i); 
        }; 
    }; 
    _out  
};

while {!(isNull (findDisplay 106))} do {

	_weapons = [] call _countWeapons;
	_magazines = [] call _countMagazines;
	_freeSlots = [] call _countFreeSlots;
	
	//diag_log format ["Freeslots : %1",_freeSlots];
	
	_freeMagazineSlots = _freeSlots select 1;
	//diag_log format ["Freeslots Magazine : %1",_freeMagazineSlots];
	
	_freeWeaponSlots = _freeSlots select 0;
	//diag_log format ["Freeslots Weapon Slots : %1",_freeWeaponSlots];
	
	sleep 0.1;
	
	if ((_freeWeaponSlots < 1) OR (_freeMagazineSlots < 5)) then {
		
		_selected = lbCurSel _control;
		//diag_log format ["Selected : %1",_selected];
		
		_selectedText = lnbText [_control,[_selected,1]];
		//diag_log format ["Selected Text : %1",_selectedText];
		
		_itemClass = [_selectedText] call _getClass;
		//diag_log format ["Item Class : %1",_itemClass];
		
		_isPistol = inheritsFrom (configFile >> "CfgWeapons" >> _itemClass);
		if (_isPistol == "Pistol") then {
		//diag_log format ["Item Class : %1 is a Pistol",_itemClass];
		};
	
		if ((isClass (configFile >> "CfgWeapons" >> _itemClass)) && 
			((getNumber (configFile >> "CfgWeapons" >> _itemClass >> "type") != 131072))) then {
			ctrlEnable [_leftArrow, false];
		} else {
			if (!(ctrlEnabled _leftArrow)) then {
				ctrlEnable [_leftArrow, true];
				};	
			};
		} else {
		if (!(ctrlEnabled _leftArrow)) then {
			ctrlEnable [_leftArrow, true];
		};
	};
};